Geoffrey De Smet

Geoffrey De Smet (Red Hat) is the lead and founder of OptaPlanner. Before joining Red Hat in 2010, he was formerly employed as a Java consultant, an A.I. researcher and an enterprise application project lead. He has contributed to many open source projects (such as drools, jbpm, pressgang, spring-richclient, several maven plugins, weld, arquillian, ...). Since he started OptaPlanner in 2006, he’s been passionately addicted to planning optimization.

Software Development
Geoffrey De SmetSeptember 10th, 2022
1 173
Bavet – A faster score engine for OptaPlanner
Drools is an extremely fast rule engine. Under the hood, OptaPlanner has used Drools as a score engine for ages.…
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Core Java
Geoffrey De SmetSeptember 23rd, 2021
0 797
How much faster is Java 17?
Java 17 (released yesterday) comes with many new features and enhancements. However, most of those require code changes to benefit…
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Web Development
Geoffrey De SmetJune 20th, 2021
0 521
Static website generation with Java, Maven and JBake
Did you notice? Last week, we migrated the entire www.optaplanner.org website (1399 files) to build with Java and Maven, instead…
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Enterprise Java
Geoffrey De SmetApril 1st, 2021
2 99
Batch solving an ActiveMQ queue that contains planning problem data sets in a scalable way
If I want to solve many data sets of a planning problem every night, what architecture can easily scale out…
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Core Java
Geoffrey De SmetFebruary 2nd, 2021
0 92
How much faster is Java 15?
Java 15 was released on the 15th of September 2020 and has promised to bring with it a few performance…
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Enterprise Java
Geoffrey De SmetOctober 30th, 2020
0 256
Solve the facility location problem
We have created a new quickstart that extends OptaPlanner use case portfolio with the facility location problem and also demonstrates…
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Enterprise Java
Geoffrey De SmetApril 9th, 2020
0 371
Constraint Streams – Modern Java constraints without the Drools Rule Language
Traditionally, to scale out with OptaPlanner, you had to learn DRL. No more. With the new Constraints Streams API, inspired…
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Software Development
Geoffrey De SmetJuly 4th, 2018
0 70
A giant leap forward with multithreaded incremental solving
OptaPlanner finally supports multithreaded incremental solving. The speedup is spectacular. Even with just a few CPU cores, it triples the…
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Core Java
Geoffrey De SmetJanuary 12th, 2018
3 442
Java Reflection, but much faster
What is the fastest way to read a getter from a Java class without knowing the class at compilation time?…
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Thank you!